CVE-2021-42756
Severity Score
9.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Attend
*SSVC
Descriptions
Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions, 6.0.7 and below, 6.1.2 and below, 6.2.6 and below, 6.3.16 and below, 6.4 all versions may allow an unauthenticated remote attacker to achieve arbitrary code execution via specifically crafted HTTP requests.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Attend
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-10-20 CVE Reserved
- 2023-02-16 CVE Published
- 2023-02-23 First Exploit
- 2024-09-23 EPSS Updated
- 2024-10-23 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-121: Stack-based Buffer Overflow
- CWE-787: Out-of-bounds Write
CAPEC
References (2)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/3ndorph1n/CVE-2021-42756 | 2023-02-23 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://fortiguard.com/psirt/FG-IR-21-186 | 2023-11-07 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Fortinet Search vendor "Fortinet" | Fortiweb Search vendor "Fortinet" for product "Fortiweb" | >= 5.6.0 < 6.0.8 Search vendor "Fortinet" for product "Fortiweb" and version " >= 5.6.0 < 6.0.8" | - |
Affected
| ||||||
| Fortinet Search vendor "Fortinet" | Fortiweb Search vendor "Fortinet" for product "Fortiweb" | >= 6.1.0 < 6.1.3 Search vendor "Fortinet" for product "Fortiweb" and version " >= 6.1.0 < 6.1.3" | - |
Affected
| ||||||
| Fortinet Search vendor "Fortinet" | Fortiweb Search vendor "Fortinet" for product "Fortiweb" | >= 6.2.0 < 6.2.7 Search vendor "Fortinet" for product "Fortiweb" and version " >= 6.2.0 < 6.2.7" | - |
Affected
| ||||||
| Fortinet Search vendor "Fortinet" | Fortiweb Search vendor "Fortinet" for product "Fortiweb" | >= 6.3.0 < 6.3.17 Search vendor "Fortinet" for product "Fortiweb" and version " >= 6.3.0 < 6.3.17" | - |
Affected
| ||||||
| Fortinet Search vendor "Fortinet" | Fortiweb Search vendor "Fortinet" for product "Fortiweb" | >= 6.4.0 <= 6.4.2 Search vendor "Fortinet" for product "Fortiweb" and version " >= 6.4.0 <= 6.4.2" | - |
Affected
| ||||||